Lamp String Wire Parallel Power Cord Voltage Drop

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Solution Overview

Problem

Existing lamp string products can only achieve single light emission and lack simultaneous color and mode switching, with significant brightness differences due to thin copper wire core issues leading to voltage drops.

Innovation Solution

A light-emitting lamp string wire design featuring parallel connections of bulb and copper wire power cords, integrated with a controller for synchronous mode and color switching, and enhanced connectors for improved installation and aesthetics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single power cord with thin copper wire core is used, then the device complexity is reduced, but the brightness uniformity deteriorates due to large front and rear voltage drop

Engineering Contradiction:

Improvepower cord structureVSAvoidbrightness uniformity

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

The power cord is segmented into multiple parallel copper wire cores instead of using a single thin core. This segmentation increases the total cross-sectional area and reduces electrical resistance, thereby reducing voltage drop along the length of the power cord and improving brightness uniformity across all lamp beads.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple copper wire cores are merged in parallel connection to form a composite power cord structure. This combining approach increases the overall current carrying capacity and reduces equivalent resistance, solving the voltage drop issue while maintaining a unified power cord structure.

Inventive Principle:

Principle #5Merging (Combining)

2Illumination intensity

If multiple power cords are used to improve brightness uniformity, then the illumination intensity is improved, but the device complexity increases

Engineering Contradiction:

Improvebrightness uniformityVSAvoidpower cord structure

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

Multiple copper wire cores are merged within a single power cord jacket, creating a multi-core composite structure. This approach achieves the electrical performance benefits of multiple separate power cords while maintaining a unified mechanical structure, thus improving brightness uniformity without proportionally increasing device complexity.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If independent core wire squeezing is performed for each power cord, then the electrical connection reliability is improved, but the ease of manufacture deteriorates

Engineering Contradiction:

Improveelectrical connectionVSAvoidproduction process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Multiple copper wire cores are combined and processed together within a single power cord manufacturing process. The cores are bundled, insulated, and jacketed as a unified structure, which simplifies the production process compared to handling multiple separate power cords, while maintaining reliable electrical connections through consistent manufacturing standards.

Inventive Principle:

Principle #5Merging (Combining)

4Adaptability or versatility

If lamp holders are connected to power cords for bulb emission, then the adaptability is improved, but the functionality deteriorates due to inability to achieve simultaneous light emission from lamp string wire and bulbs

Engineering Contradiction:

Improvelighting mode flexibilityVSAvoidcircuit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lighting system is segmented into independent controllable modules: LED lamp beads on the power cord and bulbs on separate lamp holders. Each module can be controlled independently through separate control circuits, enabling simultaneous operation in different modes and colors, thus achieving both adaptability and functional independence.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11466822B1Light-emitting lamp string wire

Publication Date: 2022.10.11 DONGGUAN GAITEWEI LIGHTING CO LTD

AI summary

The present invention relates to the field of lighting, and in particular to a light-emitting lamp string wire, wherein the light-emitting lamp string wire comprises a lamp string wire male connector, a lamp string wire female connector, and bulb power cords and copper wire lamp power cords installed between the lamp string wire male connector and the lamp string wire female connector, wherein the bulb power cords are connected in parallel with several bulbs, and the copper wire lamp power cords are connected in parallel with several LED lamp beads. With the present invention, light-emitting modes of the bulbs and said several LED lamp beads can be synchronous switched and colors thereof can be synchronous changed; a connection way of two strands of power cords effectively avoids a problem of a significant difference in brightness of front and rear lamp beads because the copper wire lamp core wires are too thin and there is a large front and rear voltage drop; and, both power control and solar control are considered. Therefore, the light-emitting lamp string wire is more beautiful, more ornamental, easier to install, and more widely used.